GI 7: Phases of Digestion Flashcards Preview

Physiology for Pharmacy > GI 7: Phases of Digestion > Flashcards

Flashcards in GI 7: Phases of Digestion Deck (17)
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1
Q

regulation of secretion takes place at the level of the ___ and ___ systems

A

endocrine and nervous

2
Q

the nervous system for secretions includes both __ and __ neural reflexes

A

short and long

3
Q

long receptor reflexes go from receptors in the GI tract to the ___ and back

A

CNS

4
Q

short receptor reflexes go from the receptors in the GI tract to The ___ and back

A

ENS

5
Q

the endocrine system secretes )____, ___ and __

A

gastrin, cholecystokinin (CCK) and secretin

6
Q

which arm of the automatic nervous system stimulates gI secretions?

A

parasympathetic

7
Q

which arm of the ANS inhibits GI secretions?

A

sympathetic

8
Q

the cephalic phase occurs at what stage of eating

A

before

9
Q

the gastric phase occurs at what stage of eating?

A

during

10
Q

the intestinal phase occurs at what stage of eating?

A

after

11
Q

the cephalic stage is stimulated by ____

A

sight , smell, taste and thought around food

12
Q

is the cephalic stage long or short reflexes?

A

long

13
Q

the cephalic stage causes the activation of the ____ (brain structure) that then stimulates the vagus nerve to stimulate the secretion of ____, ___ and ___ from the ENS (in stomach()

A

medulla oblongata; gastrin, HCL, histamine

14
Q

what is the function of the cephalic stage?

A

makes digestion more efficient

15
Q

the gastric phase of digestion is stimulated by ___ and ___ which activate the ____ (brain structure) or directly the ____ to promote the secretion of ___, ___ and ___ (gastric secretions)

A

distention of stomach and peptides in stomach ; medulla oblongata; gastrin, histamine, HCL

16
Q

t/f the gastric phase can be either long of short refelexes

A

true

17
Q

in the intestinal phase, chyme in the duodenum or containing lipids inhibit gastric secretions by what 3 mechanisms?

A
  1. chemoreceptors (sense H+ and signal medulla)
  2. local reflexes (stem by lipids and H+_
  3. secretin and cholecystokinin secreted from duodenum